Sun, Earth, and Moon. Lunar Phases Eclipses Tides. Phases of the Moon. The appearance or shape of the Moon gradually changes through the course of a month. This is called the Lunar Cycle . The Moon is not self-luminous! It reflects the light of the Sun.
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The appearance or shape of the Moon gradually changes through the course of a month. This is called the Lunar Cycle.
The Moon is not self-luminous! It reflects the light of the Sun.
The Moon circles the Earth approximately once every 29 days or 1 month.
The moon appears to change shape over the course of a lunar month (one rotation around the Earth) because, from Earth, we see different parts of the moon illuminated by the sun.
Spring tides are especially strong tides (they do not have anything to do with the season Spring). They occur when the Earth, the Sun, and the Moon are in a line. The gravitational forces of the Moon and the Sun both contribute to the tides. Spring tides occur during the full moon and the new moon.